Proceedings of the Korean Institute of Intelligent Systems Conference (한국지능시스템학회:학술대회논문집)

Korean Institute of Intelligent Systems (한국지능시스템학회)
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Decision making for CDMA HPA Bias used Fuzzy Logic Controller

퍼지제어기를 이용한 CDMA중계기의 최적동작점 결정

  • 김성식 (한국기술교육대학교 정보기술공학부) ;
  • 홍광진 (한국기술교육대학교 정보기술공학부) ;
  • 조현찬 (한국기술교육대학교 정보기술공학부) ;
  • 오창헌 (한국기술교육대학교 정보기술공학부) ;
  • 김두용 (순천향대학교 정보기술공학부) ;
  • 이규영 ((주)VSWR)
  • Published : 2003.05.01
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Abstract

Generally, the repeater in CDMA(Code Division Multiple Access) included HPA(HI-Power Amplifier) to amplifier communication signals. Also, HPA contained PD(Predistortor) to maintain the linearization of amplifier characteristics A configuration component of PD have been used electricity nonlinear devices such that diode. But this diode takes many influences at the circumstance temperature. Consequently, st can't maintain output linearization, and drop the communication Duality. The manufacturer set bias of the circuit to the manual at the first out of ware-house low. But the Q-point changes according to the change of the high temperature or low temperature. Therefore, we designed a system to maintain the Q-point by FDM(Fuzzy Decision Maker) in this paper.

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